You don’t need an antennae. I always bench tested by sticking a 3 -6 foot 16 or 14 Awg wire in the antennae plug and ground the radio.


67 Coronet 500 9.610 @ 139.20 mph
67 Coronet 500 (street car) 14.82 @ 94 mph
69 GTX (clone) - build in progress......